CN101459389B - Host board voltage regulating circuit - Google Patents
Host board voltage regulating circuit Download PDFInfo
- Publication number
- CN101459389B CN101459389B CN200710203097A CN200710203097A CN101459389B CN 101459389 B CN101459389 B CN 101459389B CN 200710203097 A CN200710203097 A CN 200710203097A CN 200710203097 A CN200710203097 A CN 200710203097A CN 101459389 B CN101459389 B CN 101459389B
- Authority
- CN
- China
- Prior art keywords
- switch
- voltage
- selector switch
- motherboard
- control end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Logic Circuits (AREA)
- Electronic Switches (AREA)
- Power Sources (AREA)
Abstract
The invention relates to a voltage adjusting circuit of a main board, which comprises a selecting switch and a first switch, wherein the selecting switch comprises an auxiliary voltage input end, a second control end and a voltage output end, the auxiliary voltage input end is connected with auxiliary voltage, the second control end is respectively connected with the auxiliary voltage and the first switch, and the first switch is further connected with a basic input output system of the main board to receive a state signal of the main board. When the main board is shut down, the state signal of the main board cuts off the first switch, further closes the selecting switch, and the auxiliary voltage stops outputting. The voltage adjusting circuit of the main board can control the voltage of the main board to output according to the state signal of the main board, which is output by the basic input output system of the main board, and the auxiliary voltage stops outputting after the main board is shut down.
Description
Technical field
The present invention relates to a kind of host board voltage regulating circuit.
Background technology
Power supply is the power component of computer, and the energy source of each parts all is to rely on power supply in the computer, and it is to guarantee the most basic prerequisite of computer hardware normal operation, we can say that power supply is the heart of computer.Each accessory in the computer all has certain power consumption; The direct current that needs the voltage height not wait; The major function of power supply is that the alternating current with the outside converts the direct current that meets the computer demand to, and function class is similar to the alternating current adapter that compact electric apparatus is used for connecting civil power.
Computer power develops into and mainly contains ATX power supply and BTX power supply two major types now, and the ATX power supply is the reference power supply of present computer.The ATX power supply is essential except possessing ± 5V, ± output of 12V four road voltages; Also have one+3.3V voltage to offer mainboard; Can directly be the power supplies of parts such as CPU, AGP video card, SDRAM, and a 5V system voltage (5V System is 5V_SYS) with a 5V boost voltage (5V Stand By; 5V_SB), the common dual voltage of a 5V (5V_DUAL) of forming of 5V_SYS voltage and 5V_SB voltage.In addition, (Power Supply-ON, PS-ON) signal provides a level signal to power supply, just can realize functions such as mouse, KBPO through 5V_SB voltage and PS-ON signal to also have a power supply start.
5V_SYS voltage is the same with other voltage; When shut down of computer or standby, stop output; And 5V_SB voltage be as long as the ATX power supply can be exported once powering on, and the inner a part of circuit of the brain of mainly supplying power uses, and makes its maintenance work under the shut down of computer state; So that the computer wake-up function to be provided when the shut down of computer, therefore have only with the attaching plug of ATX power supply pull up could the real 5V_SB of cut-out power supply.
Yet in practical application; The user usually only computer need under holding state, arousal function be provided; And do not need computer that arousal function is provided after closing; But existing computer motherboard has 5V_SB voltage all the time and keeps partial circuit work behind shut down of computer, therefore can cause unnecessary power supply waste.
Summary of the invention
In view of foregoing, be necessary to provide a kind of host board voltage regulating circuit, the voltage output on the main control system plate stops the output of 5V_SB voltage under the shut down of computer state.
A kind of host board voltage regulating circuit; Comprise a selector switch and one first switch, said selector switch comprises a boost voltage input, one second control end and a voltage output end, and said boost voltage input is connected with a boost voltage; Said second control end links to each other with said boost voltage and said first switch respectively; Said first switch also is connected with a motherboard basic input output system to receive a motherboard status signal, and after the motherboard shutdown, said motherboard status signal ends said first switch; And then said selector switch cuts out, said boost voltage stops output.
Above-mentioned host board voltage regulating circuit can be according to the motherboard status signal of motherboard basic input output system output and the power state signal of power supply; Regulation voltage is exported under the different operating situation of motherboard, and after the motherboard shutdown, stops the output of boost voltage.
Description of drawings
Combine embodiment that the present invention is done further description with reference to the accompanying drawings.
Fig. 1 is the circuit diagram of the preferred embodiments of host board voltage regulating circuit of the present invention.
Embodiment
With reference to Fig. 1; The preferred embodiments of host board voltage regulating circuit of the present invention comprises a selector switch U; Said selector switch U comprises first and boost voltage input 1 and 3, first and second control end 2 and 4 and four voltage output ends 5 ~ 8; Said voltage output end 5 ~ 8 common 5V_DUAL voltage output end of forming; Said first and boost voltage input 1 and 3 is respectively corresponding is connected with 5V_SYS voltage and a 5V_SB voltage; Said first control end 2 is connected with a computer power to receive a power state signal PWROK through a regulating circuit, and said second control end 4 is connected with a motherboard basic input output system to receive a motherboard status signal S3_EN through said regulating circuit.
Said selector switch U comprises a NMOS FET and a PMOS FET; The drain electrode of said NMOS FET is connected with the system voltage input 1 of said selector switch U; Grid is connected with first control end 2 of said selector switch U; The source electrode of said PMOS FET is connected with the boost voltage input 3 of said selector switch U; Grid is connected with second control end 4 of said selector switch U, and the source electrode of said NMOS pipe is connected with 6 with the voltage output end 5 of said selector switch U respectively, and the drain electrode of said PMOS pipe is connected with 8 with the voltage output end 7 of said selector switch U respectively.
Said regulating circuit comprises three NMOS FET Q1 ~ Q3; The drain electrode of said NMOS FET Q1 is connected with control end 4 and the said 5V_SB voltage of said selector switch U respectively; Source electrode is connected with said motherboard basic input output system to receive said motherboard status signal S3_EN and to be connected with said 5V_SB voltage through a pull-up resistor; The drain electrode of said NMOS FET Q2 is connected with first control end 2 and the 12V voltage of said selector switch U; Source ground; The drain electrode of said NMOS FET Q3 is connected with grid and the said 5V_SB voltage of said NMOS FET Q1 and Q2, and source ground, grid are connected with said computer power to receive said power state signal PWROK.
Can be known by ATX power standard and motherboard basic input output system output standard: said power state signal PWROK is high level behind electric power starting; It behind power-off low level; Said motherboard status signal S3_EN is high level down in motherboard operating state (S0 state) and off-mode (S5 state), is low level down at holding state (S3 state).
During the motherboard operate as normal; Said power state signal PWROK is a high level; Said motherboard status signal S3_EN is a high level, and therefore said NMOS FET Q3 conducting ends NMOS FET Q1 and Q2; The NMOS FET conducting of said selector switch U, the voltage output end 5 of said selector switch U and the said 5V_SYS voltage of 6 outputs.
During the motherboard standby; Said power state signal PWROK is a low level; Said motherboard status signal S3_EN is a low level, and therefore said NMOS FET Q3 ends, and makes NMOS FET Q1 and Q2 conducting; The NMOS FET of said selector switch U ends and the conducting of PMOS FET, the voltage output end 7 of said selector switch U and the said 5V_SB voltage of 8 outputs.
After the motherboard shutdown; Said power state signal PWROK is a low level; Said motherboard status signal S3_EN is a high level, and therefore said NMOS FET Q1 and Q3 all end said NMOS FET Q2 conducting; NMOS FET and the PMOS FET of said selector switch U all end, said selector switch U no-voltage output.
Above-mentioned host board voltage regulating circuit is according to motherboard status signal S3_EN and power state signal PWROK; Under motherboard operate as normal and holding state; 5V_SYS voltage and 5V_SB voltage are provided respectively; And after the motherboard shutdown, stop voltage output, and avoid motherboard shutdown continued to consume 5V_SB voltage, cause waste of energy.
Claims (4)
1. host board voltage regulating circuit; Comprise a selector switch, one first switch and a second switch, said selector switch comprises a boost voltage input, one second control end and a voltage output end, and said boost voltage input is connected with a boost voltage; Said second control end links to each other with said boost voltage and said first switch respectively; Said first switch also is connected with a motherboard basic input output system to receive a motherboard status signal, and said second switch is connected with a computer power to receive a power state signal, and said second switch also connects said first switch with level signal to said first switch according to said power state signal output correspondence; When the motherboard standby; Said motherboard status signal and said level signal make said first switch conduction, and then make said selector switch conducting, and then said boost voltage is through said selector switch output; After the motherboard shutdown; Said motherboard status signal and said level signal are ended said first switch, and then said selector switch cuts out, and said boost voltage stops through said selector switch output.
2. host board voltage regulating circuit as claimed in claim 1; It is characterized in that: said selector switch also comprises a system voltage input and one first control end; Said system voltage input is connected with a system voltage, and said first control end is connected with a reference voltage and said second switch respectively, when mainboard starting; Said power state signal ends said second switch, and then makes said selector switch open and export said system voltage.
3. host board voltage regulating circuit as claimed in claim 2; It is characterized in that: said selector switch comprises a NMOS FET and a PMOS FET; The drain electrode of said NMOS FET connects said system voltage as the system voltage input of said selector switch; Grid is as first control end of said selector switch; The source electrode of said PMOS FET connects said boost voltage as the boost voltage input of said selector switch, and grid is as second control end of said selector switch, and the source electrode of said NMOS pipe all is connected with the voltage output end of said selector switch with the drain electrode of PMOS pipe.
4. host board voltage regulating circuit as claimed in claim 3; It is characterized in that: said first switch comprises one the one NMOS FET; Said second switch comprises one second and one the 3rd NMOS FET; The drain electrode of a said NMOS FET is connected with second control end and the said boost voltage of said selector switch respectively, and source electrode is connected with said motherboard basic input output system to receive said motherboard status signal, and the drain electrode of said the 2nd NMOS FET is connected with first control end and the said reference voltage of said selector switch; Source ground; The drain electrode of said the 3rd NMOS FET is connected with the grid and the said boost voltage of the said first and second NMOS FETs, source ground, and grid is connected to receive said power state signal with said computer power.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710203097A CN101459389B (en) | 2007-12-14 | 2007-12-14 | Host board voltage regulating circuit |
| US11/965,743 US7917786B2 (en) | 2007-12-14 | 2007-12-28 | Voltage regulating circuit for motherboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710203097A CN101459389B (en) | 2007-12-14 | 2007-12-14 | Host board voltage regulating circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101459389A CN101459389A (en) | 2009-06-17 |
| CN101459389B true CN101459389B (en) | 2012-09-19 |
Family
ID=40754859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710203097A Expired - Fee Related CN101459389B (en) | 2007-12-14 | 2007-12-14 | Host board voltage regulating circuit |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US7917786B2 (en) |
| CN (1) | CN101459389B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102063175A (en) * | 2009-11-17 | 2011-05-18 | 联想(北京)有限公司 | Method for closing standby power supply, electronic equipment and mainboard |
| CN102129268A (en) * | 2010-01-14 | 2011-07-20 | 鸿富锦精密工业（深圳）有限公司 | Time sequence control circuit |
| CN102147635A (en) * | 2010-02-04 | 2011-08-10 | 鸿富锦精密工业（深圳）有限公司 | Time sequence control circuit |
| US20120042175A1 (en) * | 2010-08-12 | 2012-02-16 | Hou-Yuan Lin | Motherboard with an energy saving function |
| CN103176936A (en) * | 2011-12-26 | 2013-06-26 | 鸿富锦精密工业（深圳）有限公司 | Interface control circuit |
| CN108227900B (en) * | 2017-12-29 | 2022-03-11 | 深圳Tcl新技术有限公司 | Electronic device, energy-saving control method, energy-saving device, and readable storage medium |
| CN111045506B (en) * | 2019-12-30 | 2021-07-16 | 联想(北京)有限公司 | Control method and electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2237866Y (en) * | 1995-01-23 | 1996-10-16 | 大众电脑股份有限公司 | Host machine board sub-circuit board type central processing unit power supply apparatus |
| CN1365036A (en) * | 2001-07-10 | 2002-08-21 | 威盛电子股份有限公司 | Mainboard and computer system using elastic memory and double rate memory |
| US6775784B1 (en) * | 1999-10-25 | 2004-08-10 | Samsung Electronics Co., Ltd. | Power supply control circuit and method for cutting off unnecessary power to system memory in the power-off state |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5815455A (en) * | 1997-09-19 | 1998-09-29 | International Business Machines Corporation | Power supply interface circuit providing nonvolatile storage with suitable operating and standby voltage levels |
| US8055914B2 (en) * | 2001-08-27 | 2011-11-08 | Intel Corporation | Voltage regulation for a computer system providing voltage positioning for multi-component load |
| US7181631B2 (en) * | 2003-03-25 | 2007-02-20 | Intel Corporation | Mechanism to control an on die voltage regulator |
| US7401241B2 (en) * | 2004-06-22 | 2008-07-15 | Intel Corporation | Controlling standby power of low power devices |
| CN100334525C (en) * | 2004-06-28 | 2007-08-29 | 鸿富锦精密工业（深圳）有限公司 | USB power switch control circuit for mainboard |
-
2007
- 2007-12-14 CN CN200710203097A patent/CN101459389B/en not_active Expired - Fee Related
- 2007-12-28 US US11/965,743 patent/US7917786B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2237866Y (en) * | 1995-01-23 | 1996-10-16 | 大众电脑股份有限公司 | Host machine board sub-circuit board type central processing unit power supply apparatus |
| US6775784B1 (en) * | 1999-10-25 | 2004-08-10 | Samsung Electronics Co., Ltd. | Power supply control circuit and method for cutting off unnecessary power to system memory in the power-off state |
| CN1365036A (en) * | 2001-07-10 | 2002-08-21 | 威盛电子股份有限公司 | Mainboard and computer system using elastic memory and double rate memory |
Also Published As
| Publication number | Publication date |
|---|---|
| US20090158059A1 (en) | 2009-06-18 |
| US7917786B2 (en) | 2011-03-29 |
| CN101459389A (en) | 2009-06-17 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20131214 |